解析一行CSV数据并将其作为字符串列表返回

//package com.nowjava;

import java.util.ArrayList;//NowJava.com - 时  代  Java


public class Main {

    /**

     * Parse a line of CSV data and return it as a list of strings

     * @param data The CSV data to parse.

     * @param delimiter The delimiter to use

     * @return  The individual fields.

     */

    public static ArrayList parseCSV(String data, String delimiter) {


        String enclosure = "\"";

        String newline = "\n";


        int pos = -1;

        int last_pos = -1;

        int end = data.length();// 来 自 NowJava.com


        int row = 0;

        boolean quote_open = false;

        boolean trim_quote = false;


        ArrayList returnCells = new ArrayList();


        // Create a continuous loop

        for (int i = -1;; ++i) {

            ++pos;

            // Get the positions

            int comma_pos = data.indexOf(delimiter, pos);

            int quote_pos = data.indexOf(enclosure, pos);

            int newline_pos = data.indexOf(newline, pos);


            // Which one comes first?

            pos = min((comma_pos == -1) ? end : comma_pos,

                    (quote_pos == -1) ? end : quote_pos,

                    (newline_pos == -1) ? end : newline_pos);


            // Cache it

            //String character = (isset($data[$pos])) ? $data[$pos] : null;

            String character = "";


            boolean done = false;


            if (pos >= data.length() - 1) {

                done = true;

            } else {

                character = data.substring(pos, pos + 1);

            }


            if (pos == end) {

                done = true;

            }


            // It it a special character?

            if (done || (character.compareTo(delimiter) == 0)

                    || character.compareTo(newline) == 0) {


                // Ignore it as we're still in a quote

                if (quote_open && !done) {

                    continue;

                }


                int length = pos - ++last_pos;


                //# Is the last thing a newline?

                if (character.compareTo(newline) == 0) {

                    //# Well then get rid of it

                    --length;

                }


                // Is the last thing a quote?

                if (trim_quote) {

                    // Well then get rid of it

                    --length;

                }


                String nextCell = "";


                // Get all the contents of this column

                if (length > 0) {

                    nextCell = data.substring(last_pos, last_pos + length)

                            .replace(enclosure + enclosure, enclosure);

                }


                returnCells.add(nextCell);


                //$return[$row][] = thing(i);


                // And we're done

                if (done) {

                    break;

                }


                // Save the last position

                last_pos = pos;


                // Next row?

                if (character.compareTo(newline) == 0) {

                    ++row;

                }


                trim_quote = false;

            }

            // Our quote?

            else if (character.compareTo(enclosure) == 0) {


                // Toggle it

                if (quote_open == false) {

                    // It's an opening quote

                    quote_open = true;

                    trim_quote = false;


                    // Trim this opening quote?

                    if (last_pos + 1 == pos) {

                        ++last_pos;

                    }

                }